If so then adding it via the watch - scroll up or down to open (via buttons or touch) to open the widget glances. scroll to the bottom of the list until you see edit, press edit, then scroll to the bottom of the edit list, there should be an add option, select that then select hydration wiget from the options (if it isn't there then go to your Connect IQ app (install on phone if you don't have it - or you can go via the web) - search hydration and pick up the garmin one (or a 3rd party).
Alt option is open widget glances, long press on a glance, scroll down the options for the glance and select add glance - scroll through list and select hydration glance.
Through the app (make sure what is connected to phone - on the Home page upper right corner should show your watch with a green dot to the top right of the icon) - press on it - (I have multiple devices so takes me to a selection screen - not sure if you have this - but if you do then select device again) - select appearance - select glances - select edit. Scroll down and press and blue plus sign glance to add to glance list. Then once added use the equal sign on the right side of the list to drag the glance to the position in the glance wheel you want it. I prefer it at the end of my glance list as its something I will use multiple times a day to log my water.
